Fluke VT650 User Manual page 38

VT650/VT900
Users Manual
Gas Correction
ATP Ambient temperature and pressure (actual humidity)
ATPD Ambient temperature and pressure, dry (0 % humidity)
ATPS Ambient temperature and pressure, saturated (100 % humidity)
STP20 Standard temperature 20 °C, standard pressure 760 mmHg (actual humidity)
STP21 Standard temperature 21 °C, standard pressure 760 mmHg (actual humidity)
STPD0 Standard temperature 0 °C, standard pressure 760 mmHg, dry (0 % humidity)
STPD20 Standard temperature 20 °C, standard pressure 760 mmHg, dry (0 % humidity)
STPD21 Standard temperature 21 °C, standard pressure 760 mmHg, dry (0 % humidity)
BTPS Body temperature 37 °C, ambient pressure 760 mmHg, saturated (100 % humidity)
BTPD Body temperature 37 °C, ambient pressure 760 mmHg, dry (0 % humidity)
Note: Gas correction applies to the airflow channel. The ultra-low-flow channel of the VT900 is set to STPD21.
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Table 6. Gas Correction Mode
Description